#include <stdio.h>

int main()
{
	int h = 0;
	int r = 0;
	scanf_s("%d %d", &h, &r);
	float v = 3.14 * h * r * r;
	int c = 10000;
	int count = 0;
	while (c>0)
	{
		c -= v;
		count++;
	}
	printf("%d\n", count);

	return 0;
}